{"WriteString", func(f *File) error { _, err := f.WriteString(""); return err }},
}

// Test that all File methods give ErrInvalid if the receiver is nil.
func TestNilFileMethods(t *testing.T) {
	t.Parallel()

	for _, tt := range nilFileMethodTests {
		var file *File
		got := tt.f(file)
		if got != ErrInvalid {